When checking for XSAVE availability it makes more sense
to check for OSXSAVE than to check for XSAVE. This way the
check works on systems booted with the 'noxsave' kernel
command-line.

travis-ci: success for zdtm/static/fpu01: check for OSXSAVE instead of XSAVE
Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>